The space-rock giants had already been forced to postpone their long-awaited trip after Prog Award winner Brock was diagnosed with stress as a result of ex-member Nik Turner's attempt to register the band name on the other side of the ocean.

Now their visit to Toronto on March 9 has been called off after promoter Inertia Entertainment refused to hand over some of the ticket money to fund the journey.

Hawkwind say in a statement: "We have exhausted every avenue of negotiation to try and persuade Inertia Entertainment, who are holding ticket money, to release some payment so that the show can go ahead.